File Extension Database

Open 123 File

The files that have the 123 extension have various uses, of a different nature, some of them below:

Lotus 1-2-3 Spreadsheet

In this section, file extension 123 is a spreadsheet file created by older versions of Lotus 1-2-3, and that format is no longer supported.

Lotus 1-2-3 was one of the first spreadsheet applications available for MS-DOS and on early Windows-based computers.

It became popular in the late 1980s, replacing VisiCalc.

Since Lotus 1-2-3 is no longer available, it indicates that the 123 extension format is no longer available as well.

PCB123 Circuit Board Design

In this section, file 123 is a printed circuit board or PCB layout, created with PCB123, a PCB layout program.

PCB123 is an industrially used electronic board design program developed by Sunstone Circuits.

File 123 contains a circuit board layout, which can include multiple components, and supports 2-, 4-, and 6-layer circuit boards with solder-mask and silk-screen options.

Completed PCB123 designs can be sent to Sunstone Circuits for manufacturing.

Assembly budgets are included in the program.

Software to open and work with a 123 file

Due to the diversity of formats associated with the 123 extension, you must first make sure of the file type, and then have one of the following software packages:

Lotus 1-2-3 (Discontinued)
PCB123

How Can I Open 123 File on Windows

We researched and learned that the best way to open 123 file is to find a 123 file in question in Windows OS File Explorer and double click on it to launch the corresponding application.
If a 123 file is not opened in an application and you instead get a "Windows can't open a file" error message you should try looking for an application which can open the file in question.
If you know the application which can open 123 file then run it and see if there is a File->Open main menu option in the application.
If you don't know the application which function as 123 file opener then try to search online for "123 viewer", "application to open 123 file" or "open 123 file" queries in the search engine you like.
Install the application you found and check if it can open 123 file

How Can I Open 123 File on Mac OS

We recommend to find a 123 file in question in Mac OS Finder and double click on it to launch the corresponding application.
If a 123 file is not opened in a Mac OS application and you instead get a "There is no application set to open the file" error message you can click on "Search App Store" in the error dialog and Mac OS will show you applications compatible with 123 file.
If you know the Mac OS application which can work as 123 file opener you can choose the "Choose Application..." option in the error box to associate the file extension and open 123 file in it.
If you don't know the application which can open 123 file then try to search for "123 viewer", "application to open 123 file" or "read 123 file" queries in the online search engine you like.
Install the application you found and check if it can read 123 file

How Can I Open 123 File on Android

If you downloaded a 123 file on Android device you can open it by following steps below:

In the Android apps list on your Android device find "My Files" or "File manager" app and tap to start it.
Tap on "Downloads" folder inside the app.
You should see your downloaded 123 file in that folder.
Tap on the file. If Android device supports opening the file you downloaded it will open in the corresponding app.
If file does not open you can look for the corresponding app that can open the file by searching Android App Store for the "123".
If you cannot open the file with the apps from Android App Store it is possible that the file could only be opened on desktop platforms such as Windows or Mac OS. Try searching for "123 viewer", "123 file reader" online and see if any desktop applications can open it.
It is also possible that the file you downloaded is outdated and is no longer supported.

How to Open 123 File on iPhone or iPad

To open 123 File on iOS device follow steps below:

We advies to open Files app on your iPhone or iPad device. You can find it by swiping down on the home screen and typing "Files" in the search bar.
Tap on the Downloads folder on the Files app home screen.
You will see all files that you recently downloaded. Tap on the 123 file to view it.
If you have the right app that can open it it will automatically launch and open your file.
If you don't have the app which can open it you need to serch Apple app store for "123". This way you can find apps which can open 123 files.
If this doesn't help it is possible that your file could be opened only by the desktop application. To find an app which can open it on desktop look for "123 viewer" or "123 file" online in your favorite search engine.

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